264 



MAX LEVINE 



kauer negative strains attack the monosaccharids more vigor- 

 ously, but the disaccharids, trisaccharid, and glucoside no less 

 vigorously than the Voges-Proskauer positive strains. 



In table 3 is shown the correlation between the various reac- 

 tions. As all strains attacked galactose, lactose, maltose and 



TABLE 3 

 Showing correlation of characters among 182 strains of the coli group 



mannitol with gas formation and failed to attack the polysac- 

 charids, dextrin, inulin and starch, or to liquefy gelatin, these sub- 

 stances are not included in the table. 



The proportion of positive reactions for all strains of the B. coli 

 group is as follows: motility 130 (71.5 per cent); indol 163 (89.6 

 per cent); sucrose 93 (51.1 per cent); raffinose 96 (52.7 per cent); 

 dulcitol 97 (53.3 per cent); glycerol 125 (68.8 per cent) and 

 salicin 114 (62.7 per cent). 



The correlation coefficients for each pair of characters is given 

 in table 3a. 



The highest coefficient obtained for motility is 0.53 with both 



